Properties

Label 810.2.c.c
Level $810$
Weight $2$
Character orbit 810.c
Analytic conductor $6.468$
Analytic rank $0$
Dimension $2$
Inner twists $2$

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Show commands: Magma / PariGP / SageMath

Newspace parameters

comment: Compute space of new eigenforms
 
[N,k,chi] = [810,2,Mod(649,810)]
 
mf = mfinit([N,k,chi],0)
 
lf = mfeigenbasis(mf)
 
from sage.modular.dirichlet import DirichletCharacter
 
H = DirichletGroup(810, base_ring=CyclotomicField(2))
 
chi = DirichletCharacter(H, H._module([0, 1]))
 
N = Newforms(chi, 2, names="a")
 
//Please install CHIMP (https://github.com/edgarcosta/CHIMP) if you want to run this code
 
chi := DirichletCharacter("810.649");
 
S:= CuspForms(chi, 2);
 
N := Newforms(S);
 
Level: \( N \) \(=\) \( 810 = 2 \cdot 3^{4} \cdot 5 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 810.c (of order \(2\), degree \(1\), minimal)

Newform invariants

comment: select newform
 
sage: f = N[0] # Warning: the index may be different
 
gp: f = lf[1] \\ Warning: the index may be different
 
Self dual: no
Analytic conductor: \(6.46788256372\)
Analytic rank: \(0\)
Dimension: \(2\)
Coefficient field: \(\Q(\sqrt{-1}) \)
comment: defining polynomial
 
gp: f.mod \\ as an extension of the character field
 
Defining polynomial: \( x^{2} + 1 \) Copy content Toggle raw display
Coefficient ring: \(\Z[a_1, a_2]\)
Coefficient ring index: \( 1 \)
Twist minimal: no (minimal twist has level 90)
Sato-Tate group: $\mathrm{SU}(2)[C_{2}]$

$q$-expansion

comment: q-expansion
 
sage: f.q_expansion() # note that sage often uses an isomorphic number field
 
gp: mfcoefs(f, 20)
 

Coefficients of the \(q\)-expansion are expressed in terms of \(i = \sqrt{-1}\). We also show the integral \(q\)-expansion of the trace form.

\(f(q)\) \(=\) \( q + i q^{2} - q^{4} + ( - 2 i + 1) q^{5} + i q^{7} - i q^{8} +O(q^{10}) \) Copy content Toggle raw display \( q + i q^{2} - q^{4} + ( - 2 i + 1) q^{5} + i q^{7} - i q^{8} + (i + 2) q^{10} + 2 q^{11} - 6 i q^{13} - q^{14} + q^{16} - 2 i q^{17} - 6 q^{19} + (2 i - 1) q^{20} + 2 i q^{22} - i q^{23} + ( - 4 i - 3) q^{25} + 6 q^{26} - i q^{28} + 9 q^{29} - 2 q^{31} + i q^{32} + 2 q^{34} + (i + 2) q^{35} - 2 i q^{37} - 6 i q^{38} + ( - i - 2) q^{40} + 11 q^{41} - 4 i q^{43} - 2 q^{44} + q^{46} - 7 i q^{47} + 6 q^{49} + ( - 3 i + 4) q^{50} + 6 i q^{52} + ( - 4 i + 2) q^{55} + q^{56} + 9 i q^{58} - 4 q^{59} - 7 q^{61} - 2 i q^{62} - q^{64} + ( - 6 i - 12) q^{65} + 11 i q^{67} + 2 i q^{68} + (2 i - 1) q^{70} + 6 q^{71} - 4 i q^{73} + 2 q^{74} + 6 q^{76} + 2 i q^{77} + 12 q^{79} + ( - 2 i + 1) q^{80} + 11 i q^{82} + 11 i q^{83} + ( - 2 i - 4) q^{85} + 4 q^{86} - 2 i q^{88} + q^{89} + 6 q^{91} + i q^{92} + 7 q^{94} + (12 i - 6) q^{95} + 8 i q^{97} + 6 i q^{98} +O(q^{100}) \) Copy content Toggle raw display
\(\operatorname{Tr}(f)(q)\) \(=\) \( 2 q - 2 q^{4} + 2 q^{5}+O(q^{10}) \) Copy content Toggle raw display \( 2 q - 2 q^{4} + 2 q^{5} + 4 q^{10} + 4 q^{11} - 2 q^{14} + 2 q^{16} - 12 q^{19} - 2 q^{20} - 6 q^{25} + 12 q^{26} + 18 q^{29} - 4 q^{31} + 4 q^{34} + 4 q^{35} - 4 q^{40} + 22 q^{41} - 4 q^{44} + 2 q^{46} + 12 q^{49} + 8 q^{50} + 4 q^{55} + 2 q^{56} - 8 q^{59} - 14 q^{61} - 2 q^{64} - 24 q^{65} - 2 q^{70} + 12 q^{71} + 4 q^{74} + 12 q^{76} + 24 q^{79} + 2 q^{80} - 8 q^{85} + 8 q^{86} + 2 q^{89} + 12 q^{91} + 14 q^{94} - 12 q^{95}+O(q^{100}) \) Copy content Toggle raw display

Character values

We give the values of \(\chi\) on generators for \(\left(\mathbb{Z}/810\mathbb{Z}\right)^\times\).

\(n\) \(487\) \(731\)
\(\chi(n)\) \(-1\) \(1\)

Embeddings

For each embedding \(\iota_m\) of the coefficient field, the values \(\iota_m(a_n)\) are shown below.

For more information on an embedded modular form you can click on its label.

comment: embeddings in the coefficient field
 
gp: mfembed(f)
 
Label   \(\iota_m(\nu)\) \( a_{2} \) \( a_{3} \) \( a_{4} \) \( a_{5} \) \( a_{6} \) \( a_{7} \) \( a_{8} \) \( a_{9} \) \( a_{10} \)
649.1
1.00000i
1.00000i
1.00000i 0 −1.00000 1.00000 + 2.00000i 0 1.00000i 1.00000i 0 2.00000 1.00000i
649.2 1.00000i 0 −1.00000 1.00000 2.00000i 0 1.00000i 1.00000i 0 2.00000 + 1.00000i
\(n\): e.g. 2-40 or 990-1000
Significant digits:
Format:

Inner twists

Char Parity Ord Mult Type
1.a even 1 1 trivial
5.b even 2 1 inner

Twists

       By twisting character orbit
Char Parity Ord Mult Type Twist Min Dim
1.a even 1 1 trivial 810.2.c.c 2
3.b odd 2 1 810.2.c.b 2
5.b even 2 1 inner 810.2.c.c 2
5.c odd 4 1 4050.2.a.g 1
5.c odd 4 1 4050.2.a.be 1
9.c even 3 2 270.2.i.a 4
9.d odd 6 2 90.2.i.a 4
15.d odd 2 1 810.2.c.b 2
15.e even 4 1 4050.2.a.j 1
15.e even 4 1 4050.2.a.x 1
36.f odd 6 2 2160.2.by.b 4
36.h even 6 2 720.2.by.a 4
45.h odd 6 2 90.2.i.a 4
45.j even 6 2 270.2.i.a 4
45.k odd 12 2 1350.2.e.a 2
45.k odd 12 2 1350.2.e.i 2
45.l even 12 2 450.2.e.b 2
45.l even 12 2 450.2.e.g 2
180.n even 6 2 720.2.by.a 4
180.p odd 6 2 2160.2.by.b 4
    
        By twisted newform orbit
Twist Min Dim Char Parity Ord Mult Type
90.2.i.a 4 9.d odd 6 2
90.2.i.a 4 45.h odd 6 2
270.2.i.a 4 9.c even 3 2
270.2.i.a 4 45.j even 6 2
450.2.e.b 2 45.l even 12 2
450.2.e.g 2 45.l even 12 2
720.2.by.a 4 36.h even 6 2
720.2.by.a 4 180.n even 6 2
810.2.c.b 2 3.b odd 2 1
810.2.c.b 2 15.d odd 2 1
810.2.c.c 2 1.a even 1 1 trivial
810.2.c.c 2 5.b even 2 1 inner
1350.2.e.a 2 45.k odd 12 2
1350.2.e.i 2 45.k odd 12 2
2160.2.by.b 4 36.f odd 6 2
2160.2.by.b 4 180.p odd 6 2
4050.2.a.g 1 5.c odd 4 1
4050.2.a.j 1 15.e even 4 1
4050.2.a.x 1 15.e even 4 1
4050.2.a.be 1 5.c odd 4 1

Hecke kernels

This newform subspace can be constructed as the intersection of the kernels of the following linear operators acting on \(S_{2}^{\mathrm{new}}(810, [\chi])\):

\( T_{7}^{2} + 1 \) Copy content Toggle raw display
\( T_{11} - 2 \) Copy content Toggle raw display

Hecke characteristic polynomials

$p$ $F_p(T)$
$2$ \( T^{2} + 1 \) Copy content Toggle raw display
$3$ \( T^{2} \) Copy content Toggle raw display
$5$ \( T^{2} - 2T + 5 \) Copy content Toggle raw display
$7$ \( T^{2} + 1 \) Copy content Toggle raw display
$11$ \( (T - 2)^{2} \) Copy content Toggle raw display
$13$ \( T^{2} + 36 \) Copy content Toggle raw display
$17$ \( T^{2} + 4 \) Copy content Toggle raw display
$19$ \( (T + 6)^{2} \) Copy content Toggle raw display
$23$ \( T^{2} + 1 \) Copy content Toggle raw display
$29$ \( (T - 9)^{2} \) Copy content Toggle raw display
$31$ \( (T + 2)^{2} \) Copy content Toggle raw display
$37$ \( T^{2} + 4 \) Copy content Toggle raw display
$41$ \( (T - 11)^{2} \) Copy content Toggle raw display
$43$ \( T^{2} + 16 \) Copy content Toggle raw display
$47$ \( T^{2} + 49 \) Copy content Toggle raw display
$53$ \( T^{2} \) Copy content Toggle raw display
$59$ \( (T + 4)^{2} \) Copy content Toggle raw display
$61$ \( (T + 7)^{2} \) Copy content Toggle raw display
$67$ \( T^{2} + 121 \) Copy content Toggle raw display
$71$ \( (T - 6)^{2} \) Copy content Toggle raw display
$73$ \( T^{2} + 16 \) Copy content Toggle raw display
$79$ \( (T - 12)^{2} \) Copy content Toggle raw display
$83$ \( T^{2} + 121 \) Copy content Toggle raw display
$89$ \( (T - 1)^{2} \) Copy content Toggle raw display
$97$ \( T^{2} + 64 \) Copy content Toggle raw display
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